MSDServoDrive AC-AC Operation Manual
moog
24
Id. no.:CA65642-001 Date:03/2012
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3.5 Connection PE conductor
Step Action
PE mains connection
acc. DINEN61800-5-1
Ground each of the servo drives!
Connect terminal
in star
configuration and amply
dimensioned with the PE bar
(main ground) in the control
cabinet.
The following applies for the PE connection
(because leakage current > 3.5 mA):
•Mainsconnection<10mm²copper:use
PE-conductorcross-sectionminimum10mm²
copper or two cables with the cross-section of
the mains cables.
•Mainsconnection≥10mm²copper:usea
PE-conductor cross section complying with the
cross-section of the mains cables.
Apart from this, you must also consider
local and country specific regulations and
conditions.
Also connect the PE-conductor
terminals of all other components,
such as mains choke, filter, etc.
in a star configuration and
amply dimensioned with the
PE bar (main ground) in the control
cabinet.
W1
V2
W2
U2
U1
V1W1
V2
W2
U2
U1
V1W1
V2
W2
U2
U1
V1
PE
PE
PE PE
Fig. 3.8 Star configuration layout of PE conductor
3.6 Electrical isolation concept
The control electronics with its logics (µP), the encoder terminals and the inputs and
outputs is galvanically isolated from the power section (mains supply/DC link). All control
terminals are designed as safety extra-low voltage (SELV/PELV) circuit and must only be
operated with SELV or PELV voltages complying with the corresponding specification.
This provides reliable protection against electric shock on the control side.
You therefore need a separate control supply, compliant with SELV/PELV requirements.
The opposite overview shows the potential supplies for the individual terminals in detail.
This concept additionally enhances the operational safety and reliability of the servo
drive.
ATTENTION! Terminal X5 (motor PTC) represents a special feature with
respect to insulation and isolation. In this respect follow the notes in section
3.14 "Motor connection" from page36.
SELV = Safety Extra Low Voltage
PELV = Protective Extra Low Voltage
!